could you please help me for this issue
You will need to provide a little more information. like
node.js version: ???
how did you do the install???
a copy of the log from the install
raspberry pi 3
pi@raspberrypi:~ node -v v10.4.1 pi@raspberrypi:~ nodejs -v
ı set up raspberry pi 3 rasbian software rasbian has a node red basicly ı would download node js modbus
later on It did not work anymore
should ı set up again rasbian?
chances are the modbus node isn’t ready for nodejs10
The recommended version of nodejs is the LTS version
if you are on a raspberry pi look at the raspberry pi page in the docs on the website
The node-red that comes pre installed is an older version so you should - as ukmoose says - update. Follow the directions here: https://nodered.org/docs/hardware/raspberrypi
ı resutup raspberry pi 3
and my flow command
sudo apt-get update
sudo apt-get dist-upgrade
bash <(curl -sL https://raw.githubusercontent.com/node-red/raspbian-deb-package/master/resources/update-nodejs-and-nodered)
and how can ı install node red for modbus communication from usb
OK, which of the modbus nodes are you trying to install?
rtu and tcp/ıp
actually ı want to collect and managed my plc via raspberry pi 3 and analysis
what is command root
You haven’t answered the question.
This thread started by you’d saying that’s when you tried to install a node you had problems.
So which of the nodes are you trying to install?
How you then use modbus inside of Node-RED is a totally different question and not one I can help you with.
ok basicly ı have a plc the plc has a modbus rtu communcaiton ann ı have of this modbus data block ı have a converter from Rs 485 to USB
I want to connect raspberry pi to this plc and ı want to collect data from th plc and analysis
How can you hep me?
one question more
can ı install nodes from the manage palette? ı have installed dashboard from the managepalette. Is it possible to install all nodes from pallet.
Thanks in advance?
You can install most nodes from the manage palette option. But it is important to read the Readme for the node before installing as some will need you to install other libraries first.
Your modbus question is very different than how this question started so I suggest you close this thread and post a new question with a more suitable title.
But the first thing someone is likely to ask is have you checked the listings in flows.nodered.org so I would suggest you start by reading the readme of the list of modbus nodes on flows.nodered.org first